No
It wasn't designed to have 3rd row seating , until the 2002 redesign, thought there is an option for adding a third row. There are websites to buy them, one is www.littlepassengerseats.com
No , a 1997 Mercury Mountaineer is not designed to have a third row seat ( the 2002 and newer Mercury Mountaineer were designed to have a third row seat )
Oh, dude, adding third-row seating to a 2000 Mercury Mountaineer is like trying to turn a bicycle into a motorcycle - technically possible, but a whole lot of work. You'd have to find compatible seats, modify the interior, and probably spend a good chunk of change. So, yeah, you can do it, but it's not exactly a walk in the park.
On a 2000 Mercury Mountaineer : ( NO ) it was not designed to have a third row seat ( 2002 model years and newer could have a third row seat )
no
In a 2005 Ford Explorer : ( 3rd row seating was available )
No , 3rd row seating was available in the Ford Explorer starting with the 2002 model year
Yes the 2011 and newer has them
I have a 1998 Tahoe LS. It does not have 3rd row seats.
No , there's not enough room in a Ford Escape for a 3rd row seat
It wasn't designed to have 3 row seating , that wasn't available until the 2002 model 4 door redesign
*CAUTION*! The answer provided below is an advertisement to purchase aftermarket 3rd row seating. It DOES NOT provide any details of installing your own 3rd row seat. Check out littleseats.com for add-on seating suitable for children and small adults.